US6128149A - Method and system for detecting common mode disturbances from a dual stripe magnetoresistive head - Google Patents
Method and system for detecting common mode disturbances from a dual stripe magnetoresistive head Download PDFInfo
- Publication number
- US6128149A US6128149A US09/178,086 US17808698A US6128149A US 6128149 A US6128149 A US 6128149A US 17808698 A US17808698 A US 17808698A US 6128149 A US6128149 A US 6128149A
- Authority
- US
- United States
- Prior art keywords
- magnetic recording
- recording elements
- electrical current
- dual
- dual magnetic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/455—Arrangements for functional testing of heads; Measuring arrangements for heads
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/02—Control of operating function, e.g. switching from recording to reproducing
- G11B15/12—Masking of heads; circuits for Selecting or switching of heads between operative and inoperative functions or between different operative functions or for selection between operative heads; Masking of beams, e.g. of light beams
- G11B15/125—Masking of heads; circuits for Selecting or switching of heads between operative and inoperative functions or between different operative functions or for selection between operative heads; Masking of beams, e.g. of light beams conditioned by the operating function of the apparatus
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
- G11B33/10—Indicating arrangements; Warning arrangements
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/012—Recording on, or reproducing or erasing from, magnetic disks
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
- G11B5/39—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
- G11B5/3903—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects using magnetic thin film layers or their effects, the films being part of integrated structures
- G11B5/3906—Details related to the use of magnetic thin film layers or to their effects
- G11B5/3945—Heads comprising more than one sensitive element
- G11B5/3948—Heads comprising more than one sensitive element the sensitive elements being active read-out elements
- G11B5/3951—Heads comprising more than one sensitive element the sensitive elements being active read-out elements the active elements being arranged on several parallel planes
- G11B5/3954—Heads comprising more than one sensitive element the sensitive elements being active read-out elements the active elements being arranged on several parallel planes the active elements transducing on a single track
Abstract
Description
Claims (14)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/178,086 US6128149A (en) | 1998-10-23 | 1998-10-23 | Method and system for detecting common mode disturbances from a dual stripe magnetoresistive head |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/178,086 US6128149A (en) | 1998-10-23 | 1998-10-23 | Method and system for detecting common mode disturbances from a dual stripe magnetoresistive head |
Publications (1)
Publication Number | Publication Date |
---|---|
US6128149A true US6128149A (en) | 2000-10-03 |
Family
ID=22651125
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/178,086 Expired - Lifetime US6128149A (en) | 1998-10-23 | 1998-10-23 | Method and system for detecting common mode disturbances from a dual stripe magnetoresistive head |
Country Status (1)
Country | Link |
---|---|
US (1) | US6128149A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6204998B1 (en) * | 1996-03-28 | 2001-03-20 | Read-Rite Corporation | Multi-tapped coil having tapped segments cascaded for amplification for improving signal-to-noise ratio |
US7167331B1 (en) * | 2003-10-23 | 2007-01-23 | Marvell International Ltd. | Electrostatic discharge protection circuit for magneto-resistive read elements |
US7286328B1 (en) | 2003-10-23 | 2007-10-23 | Marvell International Ltd. | Electrostatic discharge protection circuit for preamps connected to magneto-resistive read elements |
US7656601B1 (en) | 2006-10-31 | 2010-02-02 | Marvell International Ltd. | Current biasing circuit to reduce MR common mode voltage jumping for MR resistance measurement |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5057785A (en) * | 1990-01-23 | 1991-10-15 | International Business Machines Corporation | Method and circuitry to suppress additive disturbances in data channels |
US5233482A (en) * | 1991-07-31 | 1993-08-03 | International Business Machines Corporation | Thermal asperity compensation for PRML data detection |
US5357388A (en) * | 1990-03-29 | 1994-10-18 | Eastman Kodak Company | Shorted dual element magnetoresistive reproduce head exhibiting high density signal amplification |
US5420736A (en) * | 1994-04-15 | 1995-05-30 | International Business Machines Corporation | MR read transducer with thermal noise cancellation |
US5527110A (en) * | 1993-04-30 | 1996-06-18 | International Business Machines Corporation | Method and apparatus for detecting asperities on magnetic disks using thermal proximity imaging |
US5581427A (en) * | 1994-05-04 | 1996-12-03 | International Business Machines Corporation | Peak enhanced magnetoresistive read transducer |
US5696654A (en) * | 1994-04-21 | 1997-12-09 | International Business Machines Corporation | Dual element magnetoresistive sensor with antiparallel magnetization directions for magnetic state stability |
US5701222A (en) * | 1995-09-11 | 1997-12-23 | International Business Machines Corporation | Spin valve sensor with antiparallel magnetization of pinned layers |
US5701314A (en) * | 1995-12-21 | 1997-12-23 | Cirrus Logic, Inc. | On-the-fly error correction using thermal asperity erasure pointers from a sampled amplitude read channel in a magnetic disk drive |
US5706151A (en) * | 1996-12-12 | 1998-01-06 | Eastman Kodak Company | Low bias current paired magnetoresistive head with misaligned anisotropy axes |
US5708542A (en) * | 1995-07-25 | 1998-01-13 | Sony Corporation | Thin-film magnetic head |
US6005733A (en) * | 1997-06-12 | 1999-12-21 | Vtc, Inc. | Preamplifier bias circuit for use in an AC coupled magnetoresistive read head amplifier |
-
1998
- 1998-10-23 US US09/178,086 patent/US6128149A/en not_active Expired - Lifetime
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5057785A (en) * | 1990-01-23 | 1991-10-15 | International Business Machines Corporation | Method and circuitry to suppress additive disturbances in data channels |
US5357388A (en) * | 1990-03-29 | 1994-10-18 | Eastman Kodak Company | Shorted dual element magnetoresistive reproduce head exhibiting high density signal amplification |
US5233482A (en) * | 1991-07-31 | 1993-08-03 | International Business Machines Corporation | Thermal asperity compensation for PRML data detection |
US5527110A (en) * | 1993-04-30 | 1996-06-18 | International Business Machines Corporation | Method and apparatus for detecting asperities on magnetic disks using thermal proximity imaging |
US5420736A (en) * | 1994-04-15 | 1995-05-30 | International Business Machines Corporation | MR read transducer with thermal noise cancellation |
US5696654A (en) * | 1994-04-21 | 1997-12-09 | International Business Machines Corporation | Dual element magnetoresistive sensor with antiparallel magnetization directions for magnetic state stability |
US5581427A (en) * | 1994-05-04 | 1996-12-03 | International Business Machines Corporation | Peak enhanced magnetoresistive read transducer |
US5708542A (en) * | 1995-07-25 | 1998-01-13 | Sony Corporation | Thin-film magnetic head |
US5701222A (en) * | 1995-09-11 | 1997-12-23 | International Business Machines Corporation | Spin valve sensor with antiparallel magnetization of pinned layers |
US5701314A (en) * | 1995-12-21 | 1997-12-23 | Cirrus Logic, Inc. | On-the-fly error correction using thermal asperity erasure pointers from a sampled amplitude read channel in a magnetic disk drive |
US5706151A (en) * | 1996-12-12 | 1998-01-06 | Eastman Kodak Company | Low bias current paired magnetoresistive head with misaligned anisotropy axes |
US6005733A (en) * | 1997-06-12 | 1999-12-21 | Vtc, Inc. | Preamplifier bias circuit for use in an AC coupled magnetoresistive read head amplifier |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6204998B1 (en) * | 1996-03-28 | 2001-03-20 | Read-Rite Corporation | Multi-tapped coil having tapped segments cascaded for amplification for improving signal-to-noise ratio |
US7167331B1 (en) * | 2003-10-23 | 2007-01-23 | Marvell International Ltd. | Electrostatic discharge protection circuit for magneto-resistive read elements |
US7286328B1 (en) | 2003-10-23 | 2007-10-23 | Marvell International Ltd. | Electrostatic discharge protection circuit for preamps connected to magneto-resistive read elements |
US7480121B1 (en) | 2003-10-23 | 2009-01-20 | Marvell International Ltd. | Electrostatic discharge protection circuit for preamps connected to magneto-resistive read elements |
US7852591B1 (en) | 2003-10-23 | 2010-12-14 | Marvell International Ltd. | Electrostatic discharge protection circuit for magneto-resistive read elements |
US8149531B1 (en) | 2003-10-23 | 2012-04-03 | Marvell International Ltd. | Electrostatic discharge protection circuit for magneto-resistive read elements |
US8424190B1 (en) | 2003-10-23 | 2013-04-23 | Marvell International Ltd. | Method of providing electrostatic discharge protection for a read element in a magnetic storage system |
US8462457B1 (en) | 2003-10-23 | 2013-06-11 | Marvell International Ltd. | Electrostatic discharge protection circuit for magneto-resistive read elements |
US8760791B1 (en) | 2003-10-23 | 2014-06-24 | Marvell International Ltd. | Magnetic storage systems with transistors and limiting circuits for limiting voltages across terminals of read and write devices |
US7656601B1 (en) | 2006-10-31 | 2010-02-02 | Marvell International Ltd. | Current biasing circuit to reduce MR common mode voltage jumping for MR resistance measurement |
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Legal Events
Date | Code | Title | Description |
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AS | Assignment |
Owner name: INTERNATIONAL BUSINESS MACHINES CORPORATION, NEW Y Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:YUAN-SHIH LI, ROBERT;REEL/FRAME:009544/0941 Effective date: 19981021 |
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STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
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AS | Assignment |
Owner name: MARIANA HDD B.V., NETHERLANDS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:INTERNATIONAL BUSINESS MACHINES CORPORATION;REEL/FRAME:013663/0348 Effective date: 20021231 |
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Owner name: HITACHI GLOBAL STORAGE TECHNOLOGIES NETHERLANDS B. Free format text: CHANGE OF NAME;ASSIGNOR:MARIANA HDD B.V.;REEL/FRAME:013746/0146 Effective date: 20021231 |
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AS | Assignment |
Owner name: HGST, NETHERLANDS B.V., NETHERLANDS Free format text: CHANGE OF NAME;ASSIGNOR:HGST, NETHERLANDS B.V.;REEL/FRAME:029341/0777 Effective date: 20120723 Owner name: HGST NETHERLANDS B.V., NETHERLANDS Free format text: CHANGE OF NAME;ASSIGNOR:HITACHI GLOBAL STORAGE TECHNOLOGIES NETHERLANDS B.V.;REEL/FRAME:029341/0777 Effective date: 20120723 |
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Owner name: WESTERN DIGITAL TECHNOLOGIES, INC., CALIFORNIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HGST NETHERLANDS B.V.;REEL/FRAME:040818/0551 Effective date: 20160831 |